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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Desktops > Help iMac 800 PPC flatscreen no power up

Help iMac 800 PPC flatscreen no power up
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Join Date: Dec 2012
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Dec 16, 2012, 12:38 PM
 
i have an old flat screen PPC iMac that i suspect the battery failed and has been replaced, but will not boot, prior to this it had a kernel panic and now its not chirping, the fan doesnt spin or anything when booted up ( or power button pressed as to be fair its dead) i've pressed the PMU and still nothing

is there anything else i've overlooked? or is there another FAQ for checking the rest of this unit ? ie powersupply?

all help appreciated as shame to bin a perfectly good iMac and get an intel one....
     
Mac Elite
Join Date: Oct 2008
Location: UKland
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Dec 16, 2012, 12:50 PM
 
Power supply seems to have failed. Pull Theron's lead out. Slowly reinsert it. If you hear a grounding click the power supply is still alive. No click, dead power supply.
     
gt4thug  (op)
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Dec 16, 2012, 12:53 PM
 
yes i get a sparking click... so i suppose PSU is not dead ?

thanks for responce, any more thoughts ?
     
Clinically Insane
Join Date: Nov 1999
Location: 888500128, C3, 2nd soft.
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Dec 16, 2012, 01:30 PM
 
I have a G4 iMac that won't boot either, mostly. The power supply gives off a steady, quiet ticking when it won't boot.

Occasionally, when I haven't hooked it up to power for a while, it will boot normally.
     
gt4thug  (op)
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Dec 16, 2012, 01:57 PM
 
i've tried that and it booted , to a folder, and stopped. i shut off and its now chimes and a black screen (white LED on tho) ideas ?
     
gt4thug  (op)
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Dec 16, 2012, 04:13 PM
 
a few hours of hardware re giggin and i finally get the imac to show its form.... error code 700


i have a goosed mem chip do i ? (after looking up please confirm as its the 'only' item i dont have in the house for a rebuild...)
     
   
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